100W Ultimate Fidelity Amplifier

[thimios]

Nice work!

 

[Sneha B]

I need help friends,,,
Balance input and bridge module please

 

[anoopkrajan]

Hi all,
My question is regarding the speaker protection IC uPC1237, the commonly available circuits are stereo implementation, however if I need 4 channel protection should I user two distinct modules or use the same module with the additional two channels are connected to the existing circuitry ?
Thanks in advance.

 

[fazildiken]

Most of the parts are the same for these 2 amps. So the idea was, to choose same part designators (R1, C1, etc) to same parts in layout as well as in the schematics and the BoMs.
For people who need no minimized PCBs is there an advantage: You need only 1 PCB for 2 types of amps or you get a FH9 with adjustable DC-offset and a Thiele network on PCB.
The changes in layout ar minimal: MPSA92 and MJE350 can be mounted alternatively.
The PCB is designed as a double side board (no additional costs at PCBWay), but bottom layer can be use only for one-side design.
Right now I will first post a photo preview of the PCB and the schematic of the FH11. Don't hesitate to give a feedback if you will find any failure.
Soon will follow the BoM and the Gerber files! and, finally, I will do the same for the FH9(HV) design.


The version number for all is V1.07

hi guys how can i find the gerber file for this version. I studied almost the entire form but could not find it.

 

[PPetrovic]

Apex LM317 Active Servo PSU

High sir,
I make 4 this PSU and on 2 have problems on negative channel.
I put trimmer 5K instead of 2k2, and can not regulate the minus voltage.
I have full voltage of 21V on output.
On one change opamp and it becomes stable.
On second after four additional opamp behavior is same.
I put 100n instead of 33pF and then
if put on i have 21V and

if put off and after put on the power switch, I got 15V.

I think it is oscillate. Is correct this value of 1K in feedback.
Can help if I put 10K instead ?


thanks

 

[PPetrovic]

LM Active servo psu

Repeat the message, picture is not attached.


High sir,

I make 4 this PSU and on 2 have problems on negative channel.
I put trimmer 5K instead of 2k2, and can not regulate the minus voltage.
I have full voltage of 21V on output.
On one change opamp and it becomes stable.
On second after four additional opamp behavior is same.
I put 100n instead of 33pF and then
if put on i have 21V and

if put off and after put on the power switch, I got 15V.

I think it is oscillate. Is correct this value of 1K in feedback.
Can help if I put 10K instead ?


thanks

 

[ross71]

hi guys how can i find the gerber file for this version. I studied almost the entire form but could not find it.

I hope this is it

 

[sumeshak]

Same issues here also...

Me too had the same issues...
I couldn't fix it. Dropped it.
Any body got it working.....?

Thanks and regards,
sumesh

Repeat the message, the picture is not attached.


High sir,

I make 4 this PSU and on 2 have problems on negative channel.
I put trimmer 5K instead of 2k2, and can not regulate the minus voltage.
I have full voltage of 21V on output.
On one change opamp and it becomes stable.
On second after four additional opamp behavior is same.
I put 100n instead of 33pF and then
if put on i have 21V and

if put off and after put on the power switch, I got 15V.

I think it is oscillate. Is correct this value of 1K in feedback.
Can help if I put 10K instead ?


thanks

 

[sumeshak]

Nice work

Beautiful...
Can you share the specs of LEDs?
Regards,
sumesh

Hello,
90% progress on VU12S

 

[renewoyb]

R8 and R2 values are reversed..
R8 must be 560R and R2 22K...

C7 value ,is plain wrong , and should be much lower,
something between 3.3 and 18pF..

As i pointed it with many of his designs, R5 and C3
must be removed as they create a hard rail sticking when
the amp is overloaded.
There s better means to achive stability.....

fierce

 

[fazildiken]

I hope this is it

Thanks for your help

 

[marin cornel]

Beautiful...
Can you share the specs of LEDs?
Regards,
sumesh

I used the following LEDs:
green LT T673-Q2S1-25-26E6
yellow LYT676-R1S2-26
red LS T676-Q1R2-1-Z

 

[vedmitraa]

Friends I have cloned SARA Amp , P.c.b. designed by Alex MM.revised version 5 , 2017.Changes I have made are because of the availability of the components on my end , Experts please check.

 

[vedmitraa]

Sorry friends just found a small mistake corrected it, Experts please check for any other fault.Diode on positive side , now added.

 

[Gurpreet Turna]

Sorry friends just found a small mistake corrected it, Experts please check for any other fault.Diode on positive side , now added.

Is signal gnd need psu gnd?

 

[fazildiken]

Replaced zeners with correct value and added 1N4148 on layout.

Can't find the Apex NX12 gerber file, can you help me.

 

[vedmitraa]

Since didn't get any response from Experts in the Group I decided to print, etch drill and make Sara and 2 more projects.Alpha Darlington 5 pairs out , one channel completed and tested, So it is now make and test.

 

[vedmitraa]

found one more mistake , corrected as in photo.

 

[Yurik_V]

Can't find the Apex NX12 gerber file, can you help me.

 

[fazildiken]

Thank you very much.